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发明名称
Duplex way station selector
摘要
申请公布号
US3374309(A)
申请公布日期
1968.03.19
申请号
US19640355541
申请日期
1964.03.30
申请人
THE WESTERN UNION TELEGRAPH COMPANY
发明人
ELICH JOHN;KEMPF VINCENT C.
分类号
H04L12/40
主分类号
H04L12/40
代理机构
代理人
主权项
地址
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